from nbc news world headquarters in new york, this is "nbc nightly news" with brian williams. good evening. the people at the brady campaign to prevent gun violence, the people who also compile the numbers, tell us that so far today, 203 people have been shot in this country. that's just today, and just as of 6:00 p.m. eastern time. among the shootings, kauffman, texas, an assistant district attorney gunned down and killed outside the courthouse where he worked. lincoln, nebraska. a man shot while in his apartment building after two armed men burst in. atlanta, georgia. a 14-year-old student shot in the head at price middle school this afternoon, one person in police custody. and then, of course, there's the city of chicago. more people killed there last year than american troops killed in afghanistan. more than 40 gun murders so far just this year, and today they announced a new strategy. nbc's kevin tibbles starts us off from there tonight.